塔里木盆地塔河油田不同岩溶塌陷类型地震响应特征与识别

发布时间：2018-05-03 06:33

本文选题：岩溶塌陷 + 正演分析　；参考：《天然气地球科学》2017年03期

【摘要】：塔里木盆地塔河油田奥陶系碳酸盐岩储集层类型复杂多样。作为一种重要的油气储集体,岩溶塌陷是该区勘探开发的最重要目标之一。根据地震资料和实际钻井资料,将该区的岩溶塌陷分为负载型塌陷、构造型塌陷和落水洞型塌陷3种类型,依据实际参数对之进行了模型正演。正演结果表明:岩溶塌陷体在地震上反映为上部有同相轴"下凹"、内部强"串珠"状反射和杂乱反射;不同类型塌陷具有不同特征,构造型塌陷上部同相轴"错断"明显,落水洞型塌陷上部同相轴呈现出"漏斗状"特征。岩溶塌陷体正演模拟特征与实际地震反射特征吻合较好,证明设计的3种塌陷模型较为可靠。据此,可以在该区的地震剖面上识别出相应的岩溶塌陷模式。
[Abstract]:The reservoir types of Ordovician carbonate rocks in Tahe Oilfield of Tarim Basin are complex and diverse. As an important oil and gas reservoir, karst collapse is one of the most important targets of exploration and development in this area. According to the seismic data and the actual drilling data, the karst collapse in this area is divided into three types: load type collapse, structural type collapse and sinking cave type collapse, and the model forward modeling is carried out according to the actual parameters. The forward modeling results show that the karst collapse body is reflected in the upper part of the earthquake as "concave" of the same phase axis, strong "beaded" reflection and chaotic reflection in the interior, different types of collapse have different characteristics, and the upper part of the tectonic collapse is obviously "faulted" in the same phase axis. The upper cophase axis of the cave-type collapse is characterized by funnel shape. The forward modeling characteristics of karst collapse are in good agreement with the actual seismic reflection characteristics, which proves that the three collapse models designed are more reliable. Accordingly, the corresponding karst collapse model can be identified on the seismic section in this area.
【作者单位】：中国矿业大学(北京)地测学院;中国石化西北油田分公司勘探开发研究院;中国石油大学(北京);
【基金】：政府间国际科技创新合作重点专项“碳捕集、封存、利用的示范及新一代技术研发”项目(编号:2016YFE0102500)资助
【分类号】：P618.13;P631.4

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